Reuben Hecht correspondence with Shmuel Ben-Zion, about: sending material, Hecht rescue activities (Hebrew, English).
Also in file: Ben Zion interview with Hecht about his rescue activities, article by Ben Zion "Train Mossi: negotiations with Himmler" (English), correspondence between Hecht and Moshe Halevi about writings of Ben-Zion, article by Ben Zion "Dr. Hecht and his contribution to saving Jews "(Hebrew and English).